XML 39 R26.htm IDEA: XBRL DOCUMENT v3.20.2
Property and Equipment - Components of Property and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]    
Proved oil and gas properties, at cost $ 500,888 $ 527,729
Less: Accumulated depletion and depreciation (309,396) (322,409)
Oil and Gas Properties, Net 191,492 205,320
Field and office equipment 28,254 27,542
Less: Accumulated depreciation (21,827) (20,762)
Field and Office Equipment, Net 6,427 6,780
Total Property and Equipment, Net $ 197,919 $ 212,100